JPS58167399A - Forklift - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a forklift used for cargo handling work.

Conventional forklifts have a lifting mast installed in front of the driver's seat, and lift and lower the fork section via the lifting mast to perform cargo handling operations.
Because Oaklift is equipped with a lifting mast, the overall height is high, and the lifting mast obstructs the view of the ship. It is difficult to judge the relationship between the pallet and the oak because only the pallet rises, which reduces the efficiency of high-load cargo handling.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and the purpose is to provide a forklift with good forward visibility and suitable for heavy cargo handling.Next, the first embodiment of the present invention will be described. Using the example as a drawing, 1lIj
ll, 1 in Figure 1 is the entire forklift,
In this 7 oak car 7to 1, a car body 2 and a driver's cab 50 are formed separately, and a pair of pantographs 2 are provided between the car body 2 and the driver's cab 50 to move up and down the driver's cab 50.
A lifting device 25 consisting of 6 is interposed, and a cargo handling device 56 is attached to the front side of the driver's cab 50.

2 is the above-mentioned vehicle body, and its frame 3 is equipped with front and rear wheels 4.4' and 5.5'; In room 7 is engine 8 and left and right front wheels 4, 4.
A hydraulic device 11 for driving and controlling oil motors 9 and 10, which are independently attached to each other, is housed.

Next, the outline of the hydraulic system 11 will be explained with reference to FIG. 2. This hydraulic system 11 drives the front wheels 4 and 4' independently, and the engine 8 is equipped with two variable displacement hydraulic pumps. 12.1! Both pumps 12.1!1 are mounted on the front wheel 4.4' and are connected to the pressure surface constant displacement type motors 9, 10 and the main pipe 14.15 to form the hydraulic pump 1.
2. Adjust the discharge direction and discharge amount of the pressure oil in step 15, and thereby the hydraulic motors 9 and 10, that is, the front wheel 4
The direction and speed of rotation of °4' are controlled. In the figure, reference numeral 16 denotes a supply system conduit in which a replenishment pump 17 and a check valve 18 are disposed, and the replenishment pump 17 is driven by the engine 8. Further, 19 is relief pulp. The hydraulic pumps 12 and 13 of the hydraulic system 11 arranged in this way are controlled by means of a MIIL97A front and rear tiltable 1@ set on the driver's cab 50, and a left and right steering lever 20°21. The steering lever 20 controls the discharge amount and discharge direction of the hydraulic pump 12, and the other steering lever 21 controls the discharge amount and discharge direction of the hydraulic pump 13. Specifically, electric means such as a potentiometer can be connected to the steering lever 21.220191.
At the same time, an electromagnetic solenoid is attached to the hydraulic pump 12, 150 discharge amount mechanism, and the electromagnetic solenoid is configured to be operated by the output of the potentiometer, or the hydraulic pump 12, 1. The discharge amount adjustment mechanism 5 can be configured to operate.

Reference numeral 25 denotes a 5° lifting device for the driver's cab, which is installed at the front of the frame 5, and is mainly composed of a pair of left and right pantographs 26, which are connected to two sets of arms 27.
, 28 and arms 29, 50 are superimposed in an X shape, and their superposition points are pivotally connected at bins 61.
The upper end of the arm 28 is pivotally connected to the lower end of the arm 29 with a pin 64, and the arm 27
The lower end of is pivotally connected via a pin 66.

In front, a row 2 is connected to the lower end of the arm 28 via a bottle 57.
68 is rotatably mounted, and the same roller 58
is fitted so as to be removable along the structure of a guide rail 69 which is fixed at a position corresponding to the mounting position of the support plate 65 on the rear side of the frame 5 and has a substantially C-shaped cross section. In front, the upper end of the arm 50 of the pan tag 2 flap 26 is attached to the support plate 40 fixed to the lower surface of the front end left and right of the 7 frame 51 of the driver's cab 50.
1, and a bottle 42 is attached to the upper part of arm 29.
The rollers 45 are rotatably mounted through the rollers 45, and the same rollers 45 are fixed at positions corresponding to the mounting positions of the support plates 40 on the lower surface of the front end on the left and right sides of the rear lower surface of the driver's cab 50. It is fitted so as to be able to roll along the sieve portion of the guide tray A/44, which has a substantially cm-shaped cross section. 45 is a cylinder for extending and operating the left and right pantographs 26,
Its proximal end is pivotally attached to the support plate 55 on the left and right of the front end of the 7-frame 5 by a pin 46, and the tip of the piston rod 47 is attached to a part of the arm 28 of the left and right pantograph 26. It is pivotally connected to the bin 48. The nine left and right lift cylinders 45 installed in this way are equipped with seven levers 55 mounted on the seven-point protector 52 and connected to the piping 49 of the nine hydraulic circuit, and are operated synchronously by operating the lift levers 55. In addition, the left and right pantographs 26 are configured to extend and contract in synchronization to always support the driver's cab 50 horizontally and move up and down within a predetermined lift range.

Reference numeral 50 denotes a driver's cab that is moved up and down by the lifting device 25, and a left lever 55. Fork lever 54 and steering lever 20.21
A front protector 52 equipped with other instruments is provided, and a driver's seat 55 is formed at the rear thereof.

Reference numeral 56 denotes a multi-purpose device that is hung from the front part of the frame 51. Brackets 57 are provided on the left and right ends of the front part of the 7-frame 51, and the cocoon ends of both brackets 57 are connected to each other by the front mountain plate 58. interconnected. 9. A support plate 59 is attached to the upper edge of the front plate 58, a fork shaft 60 is horizontally suspended via the support plate 59, and a rudder is attached to the fork shaft 60 to allow the fork 61 to move in the left and right direction. At the same time, the actuating plate 65 is disposed in close contact with the lower end of the back armor of the left and right seven oaks 61. Reference numeral 64 denotes a fork cylinder, which is made of stone and gives an upward angle to the fork 61, and its base is mounted at a predetermined position on the center line of the lower surface of the frame 51.
The tip of the piston loft 65 is pivotally connected to a support plate 68 mounted at the center of the back side of the actuating plate 65 by a pin 69. Pho formed like this! 1156, by operating the fork lever 54, the piston rod 65 is extended, and the rocking plate 62 is swung toward the front arm around the 7-autashaft 60, and the fork 61 is also moved to the 7-autashashaft 7 by the operating plate 65.
It is constructed so that it is raked forward about the tip 60 to give a predetermined upward angle.

Next, the operation and effects of the first embodiment configured as described above will be explained.

Now, in the example forklift 1, the vehicle body 2 and the driver's cab 50 are separately provided, and at the threshold between the vehicle body 2 and the driver's cab 50, there is a lifting device 25 that allows the driver's cab 50 to be raised and lowered using a pair of left and right pantographs 26 as main components. sI of the driver's cab 50
The cargo handling device 56 is mounted in a hanging manner on the opposite side, and the cargo handling device 56 is mounted in a hanging manner on the front side in this way.
Figure 5 (A)
As shown in FIG. 2, the fork 61 is in contact with the floor 70 and is in a vertical position. Therefore, since the cargo handling device 56 is always in the downward view from the forward line of sight of the worker in the driver's seat 55 of the driver's cab 50, as shown in FIG. When loading goods W, the pantograph 26 can be extended by operating the lever 7 trapper 56, so that the pantograph 26 can be used as a conventional elevating mast. After carrying out the service, the #handling device 56 is raised to a predetermined position together with the driver's cab 50, and in this case as well, the cargo handling device 56 and the article W are in the downward view of the worker, as shown in FIG. The mutual relationship between the highly stacked articles V and the articles W can be seen in view, and the work can be carried out efficiently and safely. (9) By placing the elevating device 25 at the lowest position, the overall height can be lowered, which is advantageous since it is possible to easily enter and exit the entrance at a relatively low entrance/exit height.

By the way, FIG. 4(a)-) shows a second embodiment of the present invention, in which the cargo handling device 72 of this 7-autalift 1 has a pair of short left and right lifting masts 75. Lifting mast 751d4 5tII of frame 51 of turntable 50
11 The lower ends of the brackets 74 are vertically installed vertically on the left and right sides, and the lower ends thereof are pivotally connected by pins 75, and the upper ends thereof are installed in front of the driver's cab 50, and are installed at approximately the same level as the front brackets 52C)A. Right and left! A cross beam 76 is arranged between the lower ends of the store 5. 77 is Rifdog 2
It is a keft, and outside *m there is a lifting mast 7507.
A pair of upper and lower rollers (not shown) with a lunge as a transfer surface is provided, and a finger bar 78 is mounted on the front end of the lift bracket 77. It is movably attached in the direction i. Further, a top plate 80 is fixed to the upper end of the lift bracket 77. What is 81? Device 72
The upper end of the piston rod 82 is flush with the lower surface of the upper plate 800, and the fork 79 moves in the vertical direction by the expansion and contraction of the piston rod 82. be done. Further, 86 is a tilt cylinder, which is disposed on the back side of the left and right lifting masts 73, and its base end is attached to the left and right sides of the frame 51 of the driver's cab 50, and is attached to a support plate 85 by a bin 86. ), and the tip of the piston rod 84 is connected to the mast 75.
The male door 6 is mounted on the rear side by pivoting to the companion support plate 87 with a pin 88, and by extending the tilt cylinder 83.
is tilted forward and backward with the bin 75 as the center and plays a predetermined tee/M)
Angle is given. In the case of the 211th embodiment, the fork lever 54 of the first embodiment becomes a tilt lever, and the other configurations are the same as those of the first embodiment.

Therefore, in the case of this second embodiment, FIG. 4(a) shows a good condition with the fork 79 at the lowest position with respect to the mast 73, and when the pantograph 26 of the lifting device 25 is folded in this state, the fork 79 is in contact with the floor m70. be done.

9, Fig. 4 (c4) This is the case where the cylinder 81 is extended and the fork 79 is placed in the uppermost position, and therefore, the lift amount of the fork 79 is given to the fork 79 with respect to the lifting mast 75. Since the articles W are located in the lower field of view than the forward line of sight A of the operator on the operator's cab 50, high stacking work can be carried out extremely efficiently and safely, and the effect is equivalent to that of the first embodiment. It is also a fork 79
Since it can move up and down with respect to the mast 75, the height can be easily adjusted when stacking high.

In the above embodiment, the forklift 1 is illustrated as being front-wheel drive, but the forklift truck 1 is not limited to this, but may be a four-wheel drive vehicle in which the rear wheels 5 are chain-driven by the front wheels 4, and the rear wheels 5' are chain-driven by the front wheels 4'. Moreover, although the elevating mast 75 of the cargo handling device 72 in the second embodiment is illustrated as a pair of left and right, the conventional acta mast and inner 1
It may also be composed of blocks.

Now, as mentioned above, the present invention provides the vehicle body and the driver's cab separately, and the lifting and lowering of goods is carried out integrally with the driver's cab by means of a lifting device mainly consisting of a pair of left and right pantographs. Since the work is carried out in a fixed manner, there is no obstruction in front of the worker's view 111, so the visibility is extremely good, and the fork and # object are placed on it, making it possible to accurately grasp the positional relationship with the nine pallets. This allows you to fully appreciate the relationship between the loads, especially when stacking loads at high levels.
It is extremely valuable as a forklift because it can perform cargo handling work and its overall height can be reduced.

[Brief explanation of drawings]

M1 figure or $3gang (a) (b) is the 11th of the present invention! !
Fig. 1 is a lv+ view, Fig. 2 is a hydraulic circuit diagram of the wheel, Fig. 3 (a) and (b) are action explanatory diagrams, and Fig. 4 (a) and (b) are non-inventive diagrams. FIG. 7 is an action explanatory diagram showing a second embodiment. Source: Toyoda Jidoki Seisakusho Co., Ltd. Buried: person
Benshio Kamioka 1) Eihikosu 1 Figure 2

Claims (3)

[Claims] (1) A car body in which the vehicle body and the driver's cab are provided separately, and the driver's cab is movable up and down using a pair of pantographs as main components between the body and the driver's cab. A forklift equipped with a lowering device and a cargo handling device attached to the front end of the 11th generation cab. (2) The forklift according to claim 1, wherein the cargo handling device is attached to hang down from the front shoulder of the driver's cab frame. (3) The cargo handling device is characterized in that the upper end thereof is provided at approximately the same level as the front protector provided uniformly on the driver's cab, and is provided with a lifting mast that hangs downward from seven frames of the driver's cab. A forklift according to claim 1.